E region

noun
1.
the region of the ionosphere in which the E layer forms.
Origin
1935-40
British Dictionary definitions for E region

E region

noun
1.
a region of the ionosphere, extending from a height of 90 to about 150 kilometres. It reflects radio waves of medium wavelength Also called Heaviside layer, Kennelly-Heaviside layer See also ionosphere
E region in Science
E region
The region of the ionosphere that lies approximately 90 to 150 km (56 to 93 mi) above the Earth's surface. This region may affect long-distance communications because it influences radio waves in the 1-3 megahertz range. Also called E layer, Heaviside layer. Compare D region, F region.